I don't think a number line is appropriate for that.
The equation of any horizontal line isY = a number
The equation of any horizontal line isY = a number .
A vertical line has the equation [ x = a number ]. A horizontal line has the equation [ y = a number ].
A horizontal line would be of the form y= (a number). There should be no 'x's involved in the equation.
This is an equation of a line. There are an infinite number of solutions which are all points on the line. It is a linear equation.
There is no equation there but the slope of the line is the number that multiplies x in the straight line equation y = mx + b whereas m is the slope and b is the y intercept
It's the equation of a straight line. Every point on the line is a solution to the equation. There are an infinite number of them.
This is a straight line graph with the equation, y = n where n is any positive or negative number.
The "answer" is a pair of two numbers ... a number for 'x' and a number for 'y' ... that make the equation a true statement. There are an infinite number of answers. You can pick any number out of the blue for 'x', and then use the equation to find out the 'y' that goes with it. Every pair you build this way is an 'answer' to the equation. If you draw the graph of this equation, you get a straight line with no ends. Every point on the line is an 'answer' to the equation, (and you can imagine how many points there are on a line with no ends).
You model your equation on a number line to using a bar model.
is an equation of a line in plane coordinate geometry. The coordinates of every point on that line satisfy the equation so there are an infinite number of solutions to the equation.
It's the equation of a straight-line graph. Every point on the line is a solution of the equation. There are an infinite number of them.